Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/50-15 | 33/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.28 (566) | 33.02 (838.72) | 10.74 (272.72) 48.2% |
| Width inches (mm) | 7.28 (185) | 12.52 (318) | 5.24 (133) 71.9% |
| Circum. inches (mm) | 70.01 (1778.14) | 103.74 (2634.92) | 33.73 (856.78) 48.2% |
| Sidewall Height inches (mm) | 3.64 (92.5) | 6.51 (165.36) | 2.87 (72.86) 78.8% |
| Revolutions per mile (km) | 905.07 (562.38) | 610.78 (379.52) | -294.29 (-182.87) -32.5% |
33/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 29.64 mph (47.7 km/h) |
| 25 mph (40.23 km/h) | 37.05 mph (59.62 km/h) |
| 30 mph (48.28 km/h) | 44.46 mph (71.54 km/h) |
| 35 mph (56.33 km/h) | 51.86 mph (83.47 km/h) |
| 40 mph (64.37 km/h) | 59.27 mph (95.39 km/h) |
| 45 mph (72.42 km/h) | 66.68 mph (107.32 km/h) |
| 50 mph (80.47 km/h) | 74.09 mph (119.24 km/h) |
| 55 mph (88.51 km/h) | 81.5 mph (131.16 km/h) |
| 60 mph (96.56 km/h) | 88.91 mph (143.09 km/h) |
| 65 mph (104.61 km/h) | 96.32 mph (155.01 km/h) |
| 70 mph (112.65 km/h) | 103.73 mph (166.94 km/h) |
| 75 mph (120.7 km/h) | 111.14 mph (178.86 km/h) |
| 80 mph (128.75 km/h) | 118.55 mph (190.78 km/h) |
| 85 mph (136.79 km/h) | 125.96 mph (202.71 km/h) |
| 90 mph (144.84 km/h) | 133.37 mph (214.63 km/h) |
| 95 mph (152.89 km/h) | 140.77 mph (226.56 km/h) |
| 100 mph (160.93 km/h) | 148.18 mph (238.48 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1554 | 1806 | 1945 | 2031 | 2123 | 2189 | 2262 | 2348 | 2467 | 2586 | 2718 | 2824 | 3016 | 3228 | 3393 | 3499 | 3558 | 3777 | 4081 | 4742 |
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